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OCTOBER 2020
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ALTERS TRAINING OPPORTUNITIES
THE NEW SCREED PLATE IN
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At Gencor®, we’ve led the industry with the most fuel-efficient, environmentally clean and lowest-maintenance design available to the hot mix industry. Gencor Industries remains focused on proactively serving and satisfying its customers from all aspects. Through improved cost-effectiveness, and quality of its products and services, Gencor’s personnel are dedicated to the principle of providing the highest quality to the industry to maintain a sustainable competitive advantage for Gencor®.
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TABLE OF CONTENTS |
OCTOBER 2020
COVER STORY Asphalt Density Can Come in Waves New screed plate system can achieve 89% density behind the paver. | 42 TECHNOLOGY MATTERS
PRODUCTION NOTES
JOBSITE INNOVATIONS
PRESERVATION UPDATE
10 Eight Reasons to Move Your Data to the Cloud
30 Why Your Baghouse is Important
46 WMA, SMA Mix Design Produces Smooth Road
56 Recycled Asphalt 101: Scratching the Surface
Cloud software and technologies deliver safer, more efficient projects and higher profits.
SPECIAL REPORT: TRAINING
A properly functioning baghouse will not only help you meet emission requirements, but also help your asphalt plant operate efficiently.
Martin Marietta combines warm mix asphalt and stone matrix asphalt on two paving projects and receives NAPA award.
16 2020-2021 Asphalt Industry Training Guide With some training courses for the asphalt industry cancelled or going virtual over the next year, this guide offers a list of opportunities for contractors to continue learning, despite the pandemic.
Asphalt’s ability to make meaningful economic and sustainable impacts makes the material ripe for opportunity and contractors should become familiar with how to properly use the recycled material.
61 Preservation Products 40 Production Products Plants, baghouses, mixers, dryers, automation systems & more to measure the quality of their asphalt.
Milling machines, reclaimers, infrared equipment & more.
54 Jobsite Products Pavers, rollers, MTVs & more.
IN EVERY ISSUE 8
Editor’s Perspective
ASPHALT CONTRACTOR OCTOBER 2020
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Engineered Innovation. From innovative designs to Caterpillar dealer service and support, Weiler is paving the way to success for contractors across North America. Weiler’s material transfer vehicles, commercial pavers, road wideners, windrow elevators, static split-drum compactors, soil stabilizers, rock drills, tack distributors and front mount screeds are engineered with innovative features to increase productivity while reducing operating costs. Weiler equipment is sold and serviced exclusively at Caterpillar dealers throughout North America.
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DIGITAL CONNECTION www.ForConstructionPros.com/Asphalt
Which Pandemicinitiated Construction Processes and Technologies are Built to Last?
[VIDEO] Economists Concerned US Headed Into Dangerous Economic Territory
Many of these processes will stick around long after we return to our so-called “normal” way of working. Here’s what to expect over the next several months and years.
Search: 21171977
Economists are concerned that recent Labor Department statistics fail to show the true picture of the economy due to the virus pandemic.
Three Asphalt Distributor Best Practices
Search: 21194696
Proper maintenance and operation ensures optimal performance. Search: 21037631
Get social with us! Share pictures of what you’re working with over 28,000 other asphalt contractors on our Facebook page: Facebook.com/ Asphalt.Contractor/
CBO: Highway Trust Fund will be Exhausted in 2021 Without Congressional action the Highway Trust Fund, the mechanism for funding highway construction, will be exhausted next fiscal year. Search: 21173958 WWW.FORCONSTRUCTIONPROS.COM/ASPHALT
CONTRACTOR WWW.FORCONSTRUCTIONPROS.COM/ASPHALT WWW.FORCONSTRUCTIONPROS.COM/ASPHALT
CONTRACTOR LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS
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LATEST INNOVATIONS INNOVATIONS FOR FOR ASPHALT ASPHALT PROFESSIONALS PROFESSIONALS LATEST
ASPHALT ASPHALT
OCTOBER 2020 Vol. 34, No. 8
CONTRACTOR CONTRACTOR LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS
LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS
Published by AC Business Media.
Asphalt
Asphalt CONTRACTOR
CONTRACTOR
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Published and copyrighted 2020 by AC Business Media. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording or any information storage or retrieval system, without written permission from the publisher. Asphalt Contractor (ISSN 1055-9205, USPS 0020-688): is published ten times per year: January, February, March/April, May, June/July, August, September, October, November, December, with an additional Buyer’s Guide issue published in August by AC Business Media, 201 N. Main Street, Fifth Floor, Fort Atkinson, Wisconsin 53538. Periodicals postage paid at Fort Atkinson, Wisconsin and additional entry offices. POSTMASTER: Please send change of address to ASPHALT CONTRACTOR, PO Box 3605, Northbrook, Illinois 60065-3605. Printed in the U.S.A. SUBSCRIPTION POLICY: Individual subscriptions are available without charge only in the USA. The Publisher reserves the right to reject nonqualifying subscribers. One-year subscription to nonqualifying individuals: U.S. $45.00, Canada & Mexico $65.00, and $95.00 all other countries (payable in U.S. funds, drawn on U.S. bank). Single copies available (prepaid only) $10.00 each (U.S., Canada & Mexico), $15.00 each (International).
ASPHALT CONTRACTOR OCTOBER 2020
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WE ARE HERE FOR YOU Full service branch offices: Atlanta Charlotte Dallas Denver Des Moines Indianapolis Kansas City
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All programs may not b e availab le in all states.
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L ook ing for a partner w ho understands your b usiness, values long-term relationships and provides you the peace of mind that comes w ith b eing insured b y an insurance carrier that is b ack ed b y the strength and stab ility of a F ortune 500 company? L ook no further. We are proud to b e a memb er of the Old R epub lic Insurance G roup, the largest b usiness segment of Old R epub lic International, one of America’ s 50 largest shareholder-ow ned insurance b usinesses.
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CONTRACTOR
EDITOR’S PERSPECTIVE
LATEST INNOVATIONS FOR ASPHALT PROFESSIONALS PROFESSIONALS LATEST LATEST INNOVATIONS INNOVATIONS FOR ASPHALT PROFESSIONALS
OCTOBER 2020 • Vol. 34, No. 8
Jessica Lombardo, Editor
Published by AC Business Media
Training During a PANDEMIC
Training may look a little different this year, but it's still important to engage your crew to ensure the long term success of your construction business
A
s businesses around the world postpone and cancel in-person meetings in response to the Coronavirus, workplace training is emerging as one of the earliest and hardest-hit activities. However, now is not the time to give up on your employees and their future success at your company. If your employees are not engaged in their careers, your company is going to suffer. Low engagement, as well as a large number of actively unengaged employees, can have significant impacts on an organization's culture and bottom line. Unengaged workers cost U.S. companies between $483 billion and $605 billion each year, according to a 2017 Gallup report of the state of the American workforce. To properly engage employees, construction business owners need to focus on work tasks that lead to increased employee job satisfaction, lowered attrition and improved performance. This usually includes sending your crew to on-the-job training events. While some manufacturers may be canceling or postponing their training, other companies are moving ahead with their training courses, making sure to follow all CDC recommended guidelines. You can head to page 16 in this issue to see all in-person training opportunities still happening over the next year.
VIRTUAL LEARNING While there is nothing like in-person, hand-on training, it's more important to keep the education going virtually than to skip the training all together and organizations should take advantage of these opportunities. Virtual meetings
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give your crew a chance to get together all at once to view training sessions. This not only increases worker engagement, it also helps bring your employees together for opportunities to address questions and address any gaps in their knowledge you may not be aware of. Many associations have increased the frequency of these virtual events during the pandemic and are happy to share their knowledge for the betterment of the industry. The National Asphalt Pavement Association (NAPA) have always been a leader in conducting webinars for their members. Since the pandemic, the association has increased frequency of their webinars and held virtual meetings to update their members on critical issues facing asphalt contractors and mix producers. A full list of their virtual meetings and webinars can be found at https://member. asphaltpavement.org/Events/Webinars. The Pavement Preservation & Recycling Alliance (PPRA) has partnered with the Federal Highway Administration (FHWA) and have had successful webinar events that have covered topics from cracksealing and chipsealing to cold in-place recycling and more. You can see a full list of their events at https://roadresource.org/webinars. While your company hurries to put safety first during this pandemic, be careful you're not pushing the pause button on critical workplace learning that will help your company be successful once the COVID-19 era ends. Stay safe out there!
ASPHALT CONTRACTOR OCTOBER 2020
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CONTRACTOR LATEST PROFESSIONALS LATEST INNOVATIONS FOR ASPHALTPROFESSIONALS LATEST INNOVATIONS FOR ASPHALT
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Asphalt CONTRACTOR
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www.ForConstructionPros.com/Asphalt
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The ALmix Insignia Control System (ICS) is a Total Plant Control System designed with simple objectives: To make the operation of asphalt plants safer, easier and more reliable while maximizing their efficiency. ICS is the fusion of a comprehensive yet user-friendly interface with a dynamic open-architecture featuring industrial duty components, all designed to serve our ever-evolving industry. ICS is powerful simplicity, engineered to help your operation succeed both today and into the future.
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TECHNOLOGY MATTERS
8
Reasons to Move Your Data to the
CLOUD
Cloud software and technologies deliver safer, more efficient projects and higher profits
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ASPHALT CONTRACTOR OCTOBER 2020
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he construction industry is in the midst of a digital data revolution as a growing number of contractors migrate to the cloud, leaving paper reports, cumbersome spreadsheets and outdated software behind. In place of inefficient processes that make it harder to foresee long-term project health and guarantee on-time, on-budget delivery, the cloud allows
contractors to focus on real-time data capture and analysis for safer, smarter projects and improved profit margins. And, it’s helping them compete and handle modern project demands, especially in the heavy highway space where projects are fiercely competitive and once won, demand faster completion times and higher quality. If you’re still using paper or
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WE LISTEN TO YOUR COMPLEX NEEDS We’re large enough to understand that every producer’s needs are different. Small enough to personally answer your call, listen to your needs and help with sound solutions, like customizing just the right asphalt plant to meet your specific production goals, or troubleshooting when surprises happen. Tell us how we can help.
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TECHNOLOGY MATTERS unreliable software to manage your business, here are eight reasons your construction organization should consider moving to the cloud:
automated workflows, dashboards and self-service reporting, you can do in minutes what traditionally took days, weeks or months.
REAL-TIME ACCESS TO RELIABLE DATA. According to a recent report from Dodge Data & Analytics, 64% of contractors said data gathering and analysis capabilities have improved in the past three years, with technologies like cloud-based construction software leading the way. Whether you’re working from a desktop at the office, a smartphone on the jobsite or a remote trailer, moving to cloud-based software means you no longer need to be tied to a physical workstation in the back office to access, share or process project data. You can consistently get the information you need, when and where you need it.
A DRAMATIC REDUCTION IN RISKS With access to real-time information, the chance for mistakes and errors — from the back office to the field — is dramatically reduced. You’ll be able to spot problems as or before they occur and resolve issues before they turn into major problems that require costly rework.
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When your data lives in the cloud, changes made in the office are automatically updated for users accessing features in the field, ensuring that your office and the field teams aren’t working off different sets of data. This lessens the potential for costly errors and saves the time that would otherwise be wasted entering information from a variety of manual processes and translating or rekeying data from one software program to another. AN INCREASE IN PRODUCTIVITY The ability to work in real-time translates directly into productivity gains. When information flows seamlessly, questions are answered immediately and bills are paid quicker. With the ability to work in real-time,
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A STRONGER DISASTER PLAN A disaster, such as a fire, flood or onpremise server failure, can bring work to a screeching halt. With software based in the cloud, critical data lives in a secure environment and is protected by the latest security protocols and standards. It’s also safe from environmental risks. With regular data backups, work can keep moving even when uncontrollable problems arise. ENHANCED SECURITY As the industry becomes more digitized, protecting data from threats is a top concern. While concerns over data security are a common hesitation for moving to the cloud, providers today are tasked with maintaining the most rigid security measures and consistently watching and planning for the very latest security threats. In fact, this level of security protocol now far surpasses the levels most contractors are able to provide themselves with on-premise data storage. COST SAVINGS The capital costs of hardware, maintenance, IT and additional software licensing required by on-premise software solutions can cost up to four times as much up-front as a cloud-based subscription model. When you add in savings gained from productivity spikes and reduced or redirected labor overhead, moving to the cloud becomes significantly more cost-effective.
SCALING FOR GROWTH With advances in technology, software and data delivery, cloud-based software sets you up to easily scale and adapt the latest technologies to meet your company’s future needs. As technologies across the globe center around the cloud, future advancements will likely require cloud adoption. By investing in the cloud today, you’ll be well positioned for the future. ATTRACTING TALENT For years, contractors have struggled to attract and retain top talent as younger generations choose careers in technology over construction jobs. By implementing the latest cloud-based technologies, tech savvy contractors are faring better at attracting and training younger generations of tech-savvy professionals. In turn, these younger professionals are forging new paths of innovation that are helping contractors achieve even more productivity and profitability. The “cloud” used to be a term that sent people running for the doors. The idea of putting personal or business information in a central, accessible repository in the ether seemed like an unreasonable risk only 10 years ago. But as advances in cloud computing technologies and the security measures surrounding them have shown, the benefits far outweigh any remaining fears. If you haven’t made the switch yet, it’s not too late to embrace the cloud and embark on a journey to safer, smarter projects with improved profit margins.
Betsie Hoyt is a senior product manager at Viewpoint, a Trimble company and leading provider of construction management software. Hoyt has more than 20 years of experience bringing innovative technology to the construction industry.
For more information on product management, visit ForConstructionPros. com/21159553
www.ForConstructionPros.com/Asphalt
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purchasing more equipment from LeeBoy in the future.” –Scott Flores, Empire Parking Lot Services, California “I've been paving for 3 generations, the absolute best investment we’ve made as a company was buying a LeeBoy. If you’re thinking about buying one, stop thinking and make the best decision of your life. Thank you LeeBoy I will be spreading the word!” –Don Hopkins, D&H Paving, New Egypt, New Jersey “Best paver made in the USA. Parts always available. Designed with the paving professional in mind. LOVE IT. Other pavers to me are not an option.” –Alan Taylor, Connecticut “I’ve been in the paving business for 30 years and wouldn’t pave with anything but a LeeBoy!” –Jeff Jarzombek, USA Seal & Stripe LLC, Celebration, Florida “I have been laying asphalt for 32 years now. I come from a time when we used to lay asphalt with a ‘dragbox’. I used to dream of a machine like the LeeBoy paver. In my opinion there is no better or labor-friendly machine like the LeeBoy. From the 1000 to the 8515, the work output and quality is simply unparalleled.” –Frank Cidade, Cidade Blacktop, Massachusetts “Can’t beat a LeeBoy. They’re tanks. It feels wrong to use any other brand. They last forever and are very comfortable.” –Nick Stanley, California “The Legend Heavy-Duty Electric Screed on our 8520 produces an impeccable mat. The noticeable level of quality continues to bring us repeat business and new referrals.” –Shawn Lail, Carolina Paving, Hickory, North Carolina “My old 8515 laid 510 ton on a church lot in Hopkinsville, KY today. Ain’t even broke a sweat yet, might even stop and do a small drive on the way home. Suns up, “Sons” working. Still as sweet today as the day l bought it.” –Randy Bennett, Bennett & Sons Paving, Kentucky “I wouldn't use any other machine except“WHY for a LeeBoy paver. They are strongIT’S machines. Very friendly staff when you have questions. Couldn't ask for a better machine.” LEEBOY? BECAUSE –Derek Heater, Black Rock & Sons Paving, Honesdale, Pennsylvania "LeeBoy’s 8520 paver is simple to operate and results in a high production paving DESIGNED WITH THE operation. No job EQUIPMENT is too big or too small. Our 8520 produces a quality mat day in and day“Iout!" –Dan Zuber,FROM Cunningham Paving, Cleveland, Ohio “I SWITCHED A LEEBOY switched from a LeeBoy paver only to return.” –Robert Wadsworth, Sunrise Asphalt, Las Vegas, Nevada "I'm a mid-size paving contractor, and for me, PAVING PROFESSIONAL IN MIND.” there's no better machine made. The versatility of the sizes available is amazing. Even the small LeeBoy can tackle largest project with ease. I tell PAVER ONLY TO the RETURN." everyone LeeBoy is the reason my family and I arePavement fed. Have been and will continue to be a customer for life." –Noah Williams, SOS Paving LLC, – Bill Stanley Jr., American Wadsworth, Tennessee “We’ve been doing asphalt paving since 1975 and owned seven LeeBoy asphalt pavers––Robert from the 700 all the way to the 8816, we would use no other asphalt paver, they are the best machines. GO LEEBOY OR GO HOME!” –Robert George, Specialists, Danbury, CT Designed with the paving professional in mind, Sunrise Asphalt, The Asphalt Company, Michigan “Great machine!!! The Legend screed makes for flawless seams!!!” –Matt Lundberg, Lundberg Paving and Excavating, Las Vegas, NVvery fluent controls.” –Thomas Brockway, Pennsylvania “I just bought a LeeBoy 8616C. Very good machine, lays a great mat, powerful engine, Clements, C&C Asphalt, Inc, Scottsboro, Alabama “BEST pavers, best people. Factory tour shows true commitment to manufacturing the GOLD standard of asphalt equipment.” –Henry Welch, Valley Supply, Hagerstown, Maryland “By far the best designer paver I have ever operated. Great customer service as well.” –Noah Cardamone, Waynesboro, Virginia “LeeBoy pavers are the only way to go. Hands down the best.” –Rocky Young, Louisiana Paving Company, Minden, Louisiana “My family business has been using LeeBoy for 3 generations now! When it comes to asphalt, SMI Paving is ‘LeeBoy Proud’ always!” –Jack Smith, SMI Paving, Fort Mill, South Carolina “I’ve been running LeeBoy equipment for over 20 years. Their pavers truly are ‘designed with the paving professional in mind’. These machines hold up better than any others too!” –Kevin Piona, Mr. Blacktop, Gilroy, California “LeeBoy is the best machine I’ve ran, period, enough said!” –Warren Anderson, Cambridge, Minnesota “LeeBoy is second to none. I’m a third generation paving contractor and they’re all we use. Professional results for the professional contractor.” –Rich Cooper, Colchester, Connecticut “Love our LeeBoy paver. Wouldn’t trade it for any other brand!” –Matthew Mordis, Asp-Con Asphalt Paving, Caseyville, IL “It's nice to see that there are still some American companies out there making equipment that last long and works well. We will definitely be purchasing more equipment from LeeBoy in the future.” –Scott Flores, Empire Parking Lot Services, California “I've been paving for 3 generations, the absolute best investment we’ve made as a company was buying a LeeBoy. If you’re thinking about buying one, stop thinking and make the best decision of your life. Thank you LeeBoy I will be spreading the word!” –Don Hopkins, D&H Paving, New Egypt, New Jersey “Best paver made in the USA. Parts always available. Designed with the paving professional in mind. LOVE IT. Other pavers to me are not an option.” –Alan Taylor, Connecticut “I’ve been in the paving business for 30 years and wouldn’t pave with anything but a LeeBoy!” –Jeff Jarzombek, USA Seal & Stripe LLC, Celebration, Florida “I have been laying asphalt for 32 years now. I come from a time when we used to lay asphalt with a ‘dragbox’. I used to dream of a machine like the LeeBoy paver. In my opinion there is no better or labor-friendly machine like the LeeBoy. From the 1000 to the 8515, the work output and quality is simply unparalleled.” –Frank Cidade, Cidade Blacktop, Massachusetts “Can’t beat a LeeBoy. They’re tanks. It feels wrong to use any other brand. They last forever and are very comfortable.” –Nick Stanley, California “The Legend Heavy-Duty Electric Screed on our 8520 produces an impeccable mat. The noticeable level of quality continues to bring us repeat business and new referrals.” –Shawn Lail, Carolina Paving, Hickory, North Carolina “My old 8515 laid 510 ton on a church lot in Hopkinsville, KY today. Ain’t even broke a sweat yet, might even stop and do a small drive on the way home. Suns up, “Sons” working. Still as sweet today as the day l bought it.” –Randy Bennett, Bennett & Sons Paving, Kentucky “I wouldn't use any other machine except for a LeeBoy paver. They are strong machines. Very friendly staff when you have questions. Couldn't ask for a better machine.” –Derek Heater, Black Rock & Sons Paving, Honesdale, Pennsylvania "LeeBoy’s 8520 paver is simple to operate and results in a high production paving operation. No job is too big or too small. Our 8520 produces a quality mat day in and day out!" –Dan Zuber, Cunningham Paving, Cleveland, Ohio “I switched from a LeeBoy paver only to return.” –Robert Wadsworth, Sunrise Asphalt, Las Vegas, Nevada "I'm a mid-size paving contractor, and for me, there's no better machine made. The versatility of the sizes available is amazing. Even the small LeeBoy can tackle the largest project with ease. I tell everyone LeeBoy is the reason my family and I are fed. Have been and will continue to be a customer for life." –Noah Williams, SOS Paving LLC, Tennessee “We’ve been doing asphalt paving since 1975 and owned seven LeeBoy asphalt pavers – from the 700 all the way to the 8816, we would use no other asphalt paver, they are the best machines. Designed with the paving professional in mind, GO LEEBOY OR GO HOME!” –Robert George, The Asphalt Company, Michigan “Great machine!!! The Legend screed makes for flawless seams!!!” –Matt Lundberg, Lundberg Paving and Excavating, Brockway, Pennsylvania “I just bought a LeeBoy 8616C. Very good machine, lays a great mat, powerful engine, very fluent controls.” –Thomas Clements, C&C Asphalt, Inc, Scottsboro, Alabama “BEST pavers, best people. Factory tour shows true commitment to manufacturing the GOLD standard of asphalt equipment.” –Henry Welch, Valley Supply, Hagerstown, Maryland “By far the best designer paver I have ever operated. Great customer service as well.” –Noah Cardamone, Waynesboro, Virginia “LeeBoy pavers are the only way to go. Hands down the best.” –Rocky Young, Louisiana Paving Company, Minden, Louisiana “My family business has been using LeeBoy for 3 generations now! When it comes to asphalt, SMI Paving is ‘LeeBoy Proud’ always!” –Jack Smith, SMI Paving, Fort Mill, South Carolina “I’ve been running LeeBoy equipment for over 20 years. Their pavers truly are ‘designed with the paving professional in mind’. These machines hold up better than any others too!” –Kevin Piona, Mr. Blacktop, Gilroy, California “LeeBoy is the best machine I’ve ran, period, enough said!” –Warren Anderson, Cambridge, Minnesota “LeeBoy is second to none. I’m a third generation paving contractor and they’re all we use. Professional results for the professional contractor.” –Rich Cooper, Colchester, Connecticut “Love our LeeBoy paver. Wouldn’t trade it for any other brand!” –Matthew Mordis, Asp-Con Asphalt Paving, Caseyville, IL “It's nice to see that there are still some American companies out there making equipment that last long and works well. We will definitely be purchasing more equipment from LeeBoy in the future.” –Scott Flores, Empire Parking Lot Services, California “I've been paving for 3 generations, the absolute best investment we’ve made as a company was buying a LeeBoy. If you’re thinking about buying one, stop thinking and make the best decision of your life. Thank you LeeBoy I will be spreading the word!” –Don Hopkins, D&H Paving, New Egypt, New Jersey “Best paver made in the USA. Parts always available. Designed with the paving professional in mind. LOVE IT. Other pavers to me are not an option.” –Alan Taylor, Connecticut “I’ve been in the paving business for 30 years and wouldn’t pave with anything but a LeeBoy!” –Jeff Jarzombek, USA Seal & Stripe LLC, Celebration, Florida “I have been laying asphalt for 32 years now. I come from a time when we used to lay asphalt with a ‘dragbox’. I used to dream of a machine like the LeeBoy paver. In my opinion there is no better or labor-friendly machine like the LeeBoy. From the 1000 to the 8515, the work output and quality is simply unparalleled.” –Frank Cidade, Cidade Blacktop, Massachusetts “Can’t beat a LeeBoy. They’re tanks. It feels wrong to use any other brand. They last forever and are very comfortable.” –Nick Stanley, California “The Legend Heavy-Duty Electric Screed on our 8520 produces an impeccable mat. The noticeable level of quality continues to bring us repeat business and new referrals.” –Shawn Lail, Carolina Paving, Hickory, North Carolina “My old 8515 laid 510 ton on a church lot in Hopkinsville, KY today. Ain’t even broke a sweat yet, might even stop and do a small drive on the way home. Suns up, “Sons” working. Still as sweet today as the day l bought it.” –Randy Bennett, Bennett & Sons Paving, Kentucky “I wouldn't use any other machine except for a LeeBoy paver. They are strong machines. Very friendly staff when you have questions. Couldn't ask for a better machine.” –Derek Heater, Black Rock & Sons Paving, Honesdale, Pennsylvania "LeeBoy’s 8520 paver is simple to operate results in a Paving, high production No job is too big or too small. Our 8520 produces a quality mat day in andLas dayVegas, out!" –Dan Zuber,and Cunningham Cleveland,paving Ohio “Ioperation. switched from a LeeBoy paver only to return. ” –Robert Wadsworth, Sunrise Asphalt, Nevada "I'm a mid-size paving contractor, and for me, there's no better machine made. The versatility of the sizes available is amazing. Even the small LeeBoy can tackle the largest project with ease. I tell everyone LeeBoy is the reason my family and I are fed. Have been and will continue to be a customer for life." –Noah Williams, SOS Paving LLC, Tennessee “We’ve been doing asphalt paving since 1975 and owned seven LeeBoy asphalt pavers – from the 700 all the way to the 8816, we would use no other asphalt paver, they are the best machines. Designed with the paving professional in mind, GO LEEBOY OR GO HOME!” –Robert George, The Asphalt Company, Michigan “Great machine!!! The Legend screed makes for flawless seams!!!” –Matt Lundberg, Lundberg Paving and Excavating, Brockway, Pennsylvania “I just bought a LeeBoy 8616C. Very good machine, lays a great mat, powerful engine, very fluentWould controls. ” –Thomas Clements, C&C Asphalt, Inc, Scottsboro, Alabama “BEST pavers, best people. Factory tour shows true you like to see your quote on a LeeBoy ad? Visit facebook.com/TrustLeeBoy and leave a 5-star review. commitment to manufacturing the GOLD standard of asphalt equipment.” –Henry Welch, Valley Supply, Hagerstown, Maryland “By far the best designer paver I have ever operated. Great customer service as well.” –Noah Cardamone, Waynesboro, Virginia “LeeBoy pavers are the only way to go. Hands down the best.” –Rocky Young, Louisiana Paving Company, Minden, Louisiana “My family business has been using LeeBoy for 3 generations
TRUST LEEBOY
TRUST LEEBOY. AS DEPENDABLE AS YOUR DAY IS LONG.
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SPECIAL REPORT: TRAINING REVIEW
Asphalt Contractor 2020-2021
TRAINING GUIDE
A
s businesses around the world postpone and cancel in-person meetings in response to the Coronavirus pandemic, workplace training is emerging as one of the earliest and hardest-hit activities. However, now is not the time to give up on your employees and their future success at your company. While some manufacturers may be canceling or postponing their training, other companies are moving ahead with their training courses, making sure to follow all CDC recommended guidelines. *These dates and schedules were accurate as of press time but are subject to change. Please contact each company directly for up-to-date information.
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SPECIAL REPORT: TRAINING REVIEW
CATERPILLAR, INC. Phone: 1-763-315-5516 Email: cat_mpls_training@cat.com Website: www.cat.com/en_us/by-industry/ paving/real-world-training-solution.html Due to the current situation, Caterpillar has not yet released the 2021 paving products training schedule. Caterpillar continues to monitor the situation for safe travel and in-classroom training for attendees. Log into the new Caterpillar Paving Campus at https:// catpavingtraining.logicbay.com/dlms/ login/ for more information. If it is your first time registering, allow 24-48 hours for approval. The following courses will again be offered in 2021:
Course: F-Series Asphalt Paver Service Training This 4-day course provides theory and hands-on training for customer
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technicians. Upon completion, students will be able to trace the flow of oil through hydraulic systems, test and adjust hydraulic pressures, troubleshoot hydraulic and electrical systems, and explain ECM functions and calibration steps for the AP1000F, AP1055F, AP600F, AP655F, AP500F and AP555F asphalt pavers. Fee: $1,400
Course: Paving Operations Training This course is designed for paving supervisors and paving crew members with one or more years of experience with the lay down of hot mix asphalt. Training is taught using Cat “F” Series Pavers with Caterpillar Grade and Slope systems. The daily curriculum includes classroom and hands-on training.
and slope controls; screed adjustments; understanding mat defects; compaction basics. The hands–on training portion of the class include transverse and longitudinal joint construction; feeder system set-up and adjustments; variable width paving; grade/slope set-up and troubleshooting; ECM calibration; critical screed adjustments. Fee: $3,100 For additional details regarding training, contact Ron Wilson, Training Consultant for Caterpillar Paving Products at 763.315.5516, or email Cat_Mpls_Training@cat.com.
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Classroom interactive sessions include fundamentals of paving; Paving By the Numbers; understanding grade
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www.ForConstructionPros.com/Asphalt
9/24/20 11:24 AM
WE DO THIS... CONTROLS
INSPECTION SERVICES
ULTRA-PORTABLE ASPHALT PLANTS
PARTS
HEATEC LIQUID AC TANKS INSPECTION
ULTRA-PORTABLE
CONTROLS PARTS Factory-built Heatec asphalt tanks store liquid asphalt ASPHALT PLANTS SERVICES cement and PMA (Polymer Modified Asphalt). Heatec’s years of experience have led to a high level of excellence. Heatec will design and build a system for you that is efficient, durable and easy to use and provide world class parts and service support, 24/7. CONTROLS
INSPECTION SERVICES
ULTRA-PORTABLE ASPHALT PLANTS
PARTS
No other North American manufacturer offers more options than Astec. CONFIGURATION CONFIGURATION CONFIGURATION CONFIGURATION
CONFIGURATION Vertical & Horizontal CONFIGURATION
CONFIGURATION
MOBILITY MOBILITY MOBILITY MOBILITY MOBILITY
CAPACITY CAPACITY CAPACITY
SALES: 423.867.4210
CONFIGURATION CONFIGURATION
CAPACITY
Portable and Stationary MOBILITY MOBILITY MOBILITY MOBILITY
CAPACITY
10,000 to 50,000 Gallons HEATERS
HEATERS HEATERS
HEATER HEATERS
Serpentine or Direct Fired
CONTROLS
INSPECTION SERVICES
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ULTRA-PORTABLE ASPHALT PLANTS
PARTS
HEATERS
ENGINEERING
HEATERS HEATERS
ENGINEERING ENGINEERING
HEATERS
ENGINEERING
www.heatec.com
9/24/20 11:25 AM
SPECIAL REPORT: TRAINING REVIEW
ROADTEC Phone: 1-800-272-7100 Website: Roadtec.com/training Roadtec, Inc. offers Paving Professionals Workshops (PPW) and Technical Service Schools in Chattanooga, TN. Students have direct access to experienced
instructors and skilled professionals who provide detailed classroom instruction and hands on demonstrations.
COURSE: Paving Professionals Workshop (PPW) Students receive comprehensive instruction in asphalt paving from industry leaders. PPW is ideal for those wishing to learn about proper
surface preparation, asphalt laydown, preventative maintenance and more. Session 1: January 4 - 5 Session 2: January 6 - 7 Session 3: January 11 - 12 Session 4: January 13 – 14
COURSE: Technical Service Schools: Students gain experience in the operation and maintenance of Roadtec equipment through instruction from experienced and skilled factory specialists. Each session covers Pavers, Mills and the Shuttle Buggy MTV. Session 1: January 18 - 22 Session 2: January 25 - 29 Session 3: February 8 - 12 Session 4: February 15 – 19
TRANSTECH SYSTEMS, INC. Phone: 1-800-724-6306 or 518-370-5558 Website: transtechsys.com
COURSE: Online Training
THE
CLEAR CHOICE FOR 2020
PARATHERM HEAT TRANSFER FLUIDS 2009 Renaissance Blvd., King of Prussia, PA 19046 USA Int’l: +1 610-941-4900 Fax: +1 610-941-9191 info@paratherm.com
Mobile friendly and at your convenience, you may review any number of TransTech Systems videos to assist with learning more about the PQI (non-nuclear asphalt density gauge) or the SDG (non-nuclear soil density gauge). These videos are great for new customers or as a refresher once your season gets under way. These videos are available at your fingertips anytime you are ready! It’s as easy as going to our website or searching for “TransTech Systems Inc” within YouTube.
COURSE: Density Clinic TransTech Systems, Inc. offers FREE density clinics. Our team provides a class that covers overall density, as well as operation and use of the nonnuclear density asphalt or soil gauge. Please call TransTech Systems if your company is interested in scheduling a date. Our clinics are by appointment, and dependent upon social distancing protocol, may be in person (at our office) or virtual. When your team completes the TransTech Density Clinic, each member will receive an Operator Training Certificate. Call today.
Paratherm.com
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TROXLER ELECTRONIC LABORATORIES, INC. Phone: 1-877-TROXLER (1-877-876-9537)/1-919-549-8661 Email: training@troxlerlabs.com Website: www.troxlerlabs.com Online training site: www.troxlerlearningcenter.com
COURSE: Hazmat Certification/ Recertification
COURSE: Refresher Course for Nuclear Gauge Operators
This course satisfies US Department of Transportation (DOT) Title 49 CFR, Part 172, Subpart H training requirements for individuals shipping or transporting hazardous materials. (Hazmat recertification is required every three years.)
If you work in a state that requires gauge operators to renew their radiation safety training periodically, this course will fulfill that requirement. (Please note, however, that it is not a hazmat recertification course.)
ONLINE COURSES: Our online courses allow to you to earn certifications and gain new skills/refresh old ones when it suits your schedule. For more information or to register for a course, click Online Training - NEW on the Training menu at www.troxlerlabs. com.
NEW COURSE: Troxler Nuclear Gauge User Training- 3400 Series Gauges This course trains nuclear gauge users on the Troxler Model 3400 series gauges. The technology used, proper procedures, maintenance and safety tips are the focus of this new course. This is the perfect course for new gauge users.
COURSE: Nuclear Gauge Safety Training plus Hazmat Every new nuclear gauge operator must undergo safety training and be certified to use nuclear gauges. (Our online course is accepted for certification by most state agencies.)
P lantWise Asphalt Drum Mix Automation Leveraging 50+ years of experience, the PlantWise Drum Mix
Control System offers producers unparalleled technology, ease-ofuse, and configurability. ✓ retrofit or total plant control ✓ easy calibration ✓ configurable screens “
Topics Covered: • Radiation safety fundamentals and principles • Regulatory requirements • Portable gauge theory and operation • Gauge maintenance • Gauge packaging, storage, and transport
NEW COURSE: Radiation Safety Officer Training This course teaches a radiation safety officer (RSO) responsibilities of the job.
” - Steve Fox, General Manager, Asphalt Div. “
” - Bill Schmitz, Vice President QC & Sales
“
Topics Covered: • Radiation safety fundamentals and principles • License application and renewal • Regulatory requirements, record-keeping, and other RSO responsibilities • Incidents and accidents • Inspections
www.ForConstructionPros.com/Asphalt
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’ ” - Domenic Mileto, Operations Manager Contact us for a demonstration
librasystems.com
215.256.1700
today!
OCTOBER 2020 ASPHALT CONTRACTOR
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SPECIAL REPORT: TRAINING REVIEW CLASS: Radiation Safety Officer Training This course teaches an RSO the responsibilities of the job. Topics Covered: • Radiation safety fundamentals and principles • License application and renewal • Regulatory requirements, record-keeping, and other RSO responsibilities • Incidents and accidents • Inspections
CLASS: Hazmat Certification/ Recertification This course satisfies DOT Title 49 CFR, Part 172, Subpart H training requirements for individuals shipping or transporting hazardous materials. (Hazmat recertification is required every three years.)
ULTR ASPH
WIRTGEN AMERICA INC. Phone: 1-615-501-0600 Website: https://www.wirtgen-group. com/en-us/customer-support/training/
Topics Covered: • • • • •
Radiation safety New regulatory requirements Operating and emergency procedures Maintenance Transportation procedures
COURSE: Compaction & Density Testing In this course, you will learn the basic principles of compaction and density testing methods (with an emphasis on nuclear testing methods).
IN-PERSON or VIRTUAL CLASSES: Due to current restrictions and limitations on in-person training we are scheduling these classes as they are requested. If you are interested in scheduling one of the classes below, please contact us at training@troxlerlabs. com.
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In-person, hands-on non-nuclear and nuclear gauge training is available at our headquarters in Research Triangle Park, NC, and through our regional sales and service representatives by request. (To schedule a session, contact us at training@troxlerlabs.com.)
CLASS: Nuclear Gauge Safety Training plus Hazmat Every new nuclear gauge operator must undergo safety training and be certified to use nuclear gauges. (Our in-person class is accepted for certification by all state agencies.) Topics Covered: • Radiation safety fundamentals and principles • Regulatory requirements • Portable gauge theory and operation • Gauge maintenance • Gauge packaging, storage, and transport
The 40,000+ sq. ft. state-of-the-art facility houses eleven classrooms as well as four bays dedicated exclusively to training so hands on training can take place regardless of weather. The CTT includes a 5-acre test track for equipment demonstrations and handson application training for the WIRTGEN GROUP products as well as an on-site cafeteria for meals and snacks during your sessions.
WIRTGEN COURSE: W 200Fi Series Cold Milling Operation
ULTR ASPH
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ULTR ASPH
ULTR Sm ASPH
This course covers safe work practices on and around cold milling machines. Participants learn about Wirtgen cutting technology and operation/application best practices for the W200Fi series cold milling machine. Machine operator controls, Level Pro Active and daily/ routine maintenance are covered in detail. Participants are provided the opportunity to apply what they learn preparing them for daily machine operation. Fee: $570
www.ForConstructionPros.com/Asphalt
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Th in a As cap up ULTR po
ASPH
SA
ULTRA-PORTABLE ASPHALT PLANTS
PARTS
ULTRA-PORTABLE ASPHALT PLANTS
PARTS
AND WE DO THIS...
ULTRA-PORTABLE ASPHALT PLANTS
PARTS
VOYAGER DOUBLE BARRELTM ASPHALT MIXING PLANT
ULTRA-PORTABLE PARTS Small plant footprint, big ASPHALT PLANTS
plant features. The Astec Voyager DB plants delivers full-size plant features in a compact, highly-portable configuration. Based upon Astec’s proven Double Barrel® drum mixer, with production capacity up to 140 tonnes/hr and RAP mixing capability up to 50%, the Voyager DB plants sets the standard for ULTRA-PORTABLE portability, production, PARTSand sustainability.
ASPHALT PLANTS
SALES: 423.867.4210
A unique approach to asphalt mixing technology.
MOBILITY
The modular design enhances portability and reduces setup time
EASY PLANT ERECTION No cranes needed for set-up
RECYCLE
Can produce asphalt pavement mix with up to 50% recycle content
FLEXIBILITY
Easily adapts to the local site
www.astecinc.com
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SPECIAL REPORT: TRAINING REVIEW COURSE: W 200i Series Cold Milling Operation This course covers safe work practices on and around cold milling machines. You learn factory-recommended operational practices for the W 200 series cold milling machines. Machine operator controls and Level Pro+ will be reviewed in detail preparing you for daily machine operation. Fee: $570
COURSE: W 200i Series Technical Service This course covers safe work practices on and around the W 200i series cold milling machines. You will learn factoryrecommended maintenance practices for proper maintenance of W 200i series cold milling machines (The W 200Fi is not covered in this course). Fee:$855
COURSE: W 100CFi - W 150CFi Cold Milling Operation This course covers safe work practices on and around cold milling machines. You will learn about cutting technology,
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best practices of operating a Wirtgen compact cold-milling machine, operator controls, Level Pro Plus and routine maintenance. This course prepares you for daily machine operation. Fee:$570
COURSE: W 100CFi /W150CFi Technical Service You will learn factory-recommended practices for maintenance of Wirtgen 100-150CFi cold milling machines. After completing this course, you will be better prepared to diagnose machine problems and increase machine uptime. Fee:$855
COURSE: WR 200 Series Cold Recycling Operation To familiarize you with the machine and its many components. Safety practices, machine safety documentation and safety components will be covered. The controls and functions will be covered in detail. Finally, we will examine daily machine maintenance and component wear identification.
Fee:$570
COURSE: WR 200 Series Cold Recyclers Technical Service The WR 200 Series Soil Stabilizer will be the focus of this course. This course covers safe work practices on and around Soil Stabilizer machines. You will learn factory-recommended maintenance practices for proper maintenance of WR 200 Series Soil Stabilizer machines. After completing this course, you will be better prepared to diagnose machine problems and increase machine uptime. Fee:$855
WIRTGEN SLIPFORM PAVERS COURSE: SP 25/25i Technical Service & Operation This course covers safe work practices on and around slipform pavers. You will learn the fundamental principles of slipform machines pertaining to the application capabilities of the machine. You will learn to set up and adjust the basic control and operation of the machine and how to locate and assign
www.ForConstructionPros.com/Asphalt
9/24/20 11:28 AM
In July 2020, Sapphire Gas Solutions was formed by joining Blue Roads Solutions and Thigpen Solutions into one company. The newly formed Sapphire Gas Solutions is still committed to focus on serving the road construction industry with the same quality product and service with broader offerings of LNG and CNG fueling capabilities.
NEW NAME, SAME PASSION FOR EXCELLENCE IN ASPHALT Sapphire Gas Solutions is a Texas based LNG and CNG solutions provider targeting the mobile and off pipe use o natural gas in the utility, industrial, and pipeline industries. Through years o e perience provide and to asphalt plants, pipeline integrity projects, supplemental winter gas supplies, and a myriad o other applications, Sapphire is a true, national, virtual pipeline solution.
In addition to our emphasis on Asphalt Plants and Remote Power Generation, we now also help with: Winter supply eavy uel replacement Pipeline integrity ipeline curtailments Supplemental pipeline supply
mergency pipeline outages Pipeline integrity ipeline curtailments Supplemental pipeline supply mergency pipeline outages
sapphirenatgas.com sales@sapphirenatgas.com
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9/24/20 11:28 AM
SPECIAL REPORT: TRAINING REVIEW systems. You will also get an in-depth look at all controls and displays. Fee:$1,140
COURSE: VÖGELE 8’-3i Super Technical Service After completing this course, you will be better prepared to perform service repairs and diagnose operational problems of the Super 170X-3i paver. You will learn factory-recommended procedures for doing service repairs and troubleshooting electrical and hydraulic systems. You will also get an in-depth look at all controls and displays. Fee:$1,140
COURSE: VÖGELE Paver Operations/Application This course covers how to safely operate and work around a VÖGELE paver. You will learn factory-recommended best practices for machine operation and for performing daily and scheduled maintenance. After completing this course, you will be better prepared to operate a VÖGELE paver according to manufacturer’s recommendations. You will learn principles and concepts of paving related to the operation of the VÖGELE paving machines. Fee:$570 the machine control components, onboard computer and display operation. You will also learn to have a basic understanding of concrete and concrete mixes. After completing this course you will better understand the individual function groups of the machine and basic settings and application setup. Fee:$645
COURSE: SP AutoPilot 2.0 Operations & Application This course covers safe work practices on and around Wirtgen slipform machines. You will learn the fundamental principles & application capabilities of SP 15i/25i pavers equipped with AutoPilot 2.0. You will also learn how to locate machine components & recognize their functions, how to set up & adjust the machine for AutoPilot applications, & perform machine/display operations. Additionally, you will learn functional principles & basic operation, as well as the menu system of the Wirtgen Field Rover, Base Station, & elevation controls. Fee:$855
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COURSE: SP 60i / 90i / 124i Operations & Application This course covers safe work practices on and around Wirtgen slipform machines. You will learn the fundamental principles & application capabilities of mainline slipform pavers. You will also learn how to locate components & recognize their functions (on-board computers, display, etc.), how to set up & adjust the machine for inset application, & perform machine/display operations. Additionally, you will be able to recognize how different concrete mixes affect the final product. Fee:$1,282.50
VÖGELE COURSE: VÖGELE 10’-3i Super Technical Service After completing this course, you will be better prepared to perform service repairs and diagnose operational problems of the Super 200X-3i paver. You will learn factory-recommended procedures for doing service repairs and troubleshooting electrical and hydraulic
COURSE: VÖgele Super 1800-3iSJ Operations Service This course covers how to safely operate and work around a VÖGELE paver. You will learn factory-recommended best practices for machine operation and performing daily and scheduled maintenance. After completing this course, you will be better prepared to perform service repairs and diagnose operational problems of the Super 1800-3iSJ paver. You will learn factory recommended procedures for doing service repairs and troubleshooting electrical and hydraulic systems. You will also get an in-depth look at all controls and displays. Fee: $1,140
Course: VÖGELE Super 1800 - 3iSJ Technical Service This course prepares you to safely perform basic machine operations as well as service a VÖGELE Super 1800-3iSJ paver. You will learn the steps to prepare the paver for work, as well as how to calibrate the spray
www.ForConstructionPros.com/Asphalt
9/24/20 11:30 AM
INS S
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INS S
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Tra S but rep you
An ins and
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INS S
INSPECTION SERVICES
ULTRA-PORTABLE ASPHALT PLANTS
PARTS
AND WE DO THIS... INSPECTION SERVICES
ULTRA-PORTABLE ASPHALT PLANTS
PARTS
SILOBOTSM INSPECTION SERVICE
INSPECTION
ULTRA-PORTABLE
A unique approach to asphalt silo inspection.
SAFER
PARTS Traditional are costly, time-consuming and risky, ASPHALT PLANTS SERVICES silo inspections but failure to regularly inspect silo interiors could result in costly repairs or even catastrophic failure. With regular inspections, you can perform preventative maintenance that extends silo life.
CONVENIENT
An Astec SiloBotSM inspection takes less than two hours to fully inspect the entire silo. A traditional inspection takes much longer and only inspects the bottom third.
FASTER & LESS DOWNTIME
INSPECTION SERVICES
ULTRA-PORTABLE ASPHALT PLANTS
PARTS
To schedule a Silo Inspection call 423.356.4791
Technician stays safely outside of the silo during inspection
No scaffolding needed
Full inspection in less than two hours per silo
COST EFFECTIVE
Less cost than a traditional inspection
INSPECTION SERVICES
ULTRA-PORTABLE ASPHALT PLANTS
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PARTS
www.astecinc.com
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SPECIAL REPORT: TRAINING REVIEW system according to job specs and apply spray paving operation best practices. In addition, you will learn the locations and functions of the machine’s controls/components, as well as how to troubleshoot, test, diagnose and repair the various systems (spray, air compressor, electrical and hydraulic). Fee: $855
HAMM Course: HAMM Compact Asphalt & Dirt Rollers This courses offers a general introduction to application and technical information of HD 8-14 Compact Rollers and H5-7 Soil Rollers. This course covers how to safely work on and around HAMM compaction equipment. You will learn factory-recommended best practices for proper upkeep of compaction machines. After completing this course, you will be better prepared to complete a machine startup, diagnose machine problems and help increase machine uptime.
Fee: $570
WIRTGEN GROUP COURSE: WITOS FleetView Basics This course covers will allow you to navigate through the different views within WITOS FleetView. You will explore ways to track ma- chines, schedule alerts for maintenance and radius parameters as well as easily export historical data.
It provides equipment owners, operators, user-fixers, paving crews and technicians with efficient, effective and safe methods for getting the most out of paving equipment. Day 3 consists of a course review and final exam (70% required to pass). Participants who achieve a passing score earn a certificate from Florida International University. Fee: $500
Fee: $285
SPECIAL OFFERINGS Florida International University Paving Academy hosted at Wirtgen America
COURSE: Paver: Machine Operations & Quality
For more information on training, visit ForConstructionPros. com/21194560
This course is part of the Florida International University (FIU) Paving Academy, a certificate program established by FIU College of Engineering & Computing, Department of Civil and Environmental Engineering Green Paving Initiative.
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www.ForConstructionPros.com/Asphalt
9/24/20 11:31 AM
& Safety & Electro-Mechanical On-Line Classroom Mid-January to Mid-March Zoom in and join industry leader Clarence Richard.
*Classes fill on first come basis.
Improve . . . • • • •
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ACON1020_16-29_TrainingGuide_J.indd 29
Safety Mix Quality Production Operating Costs
Private Workshops Available Register online www.clarencerichard.com under Training or contact Carrie. Phone: 952.939.6000 Email: carrie@clarencerichard.com 9/24/20 8:38 PM
PRODUCTION NOTES |
BY JESSICA LOMBARDO, EDITOR
Why Your
BAGHOUSE
is Important
A A properly functioning baghouse will not only help you meet emission requirements, but also help your asphalt plant operate efficiently
A
ccording to the Federal Highway Administration, there are approximately 3,600 hot mix asphalt plants in the U.S. that make over 500 million tons of asphalt material each
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year. With all that mix being produced, it’s estimated that nearly 8 million tons of dust fines are generated annually. So just where does all that excess dust go? The baghouse. Like it or not, it’s the responsibility of the plant operator to ensure they are not exceeding dust limitations at the plant in order to comply with the Federal New Source Performance Standards. Therefore, installing a baghouse that not only works efficiently, but also operates properly at all times, is paramount to mix production success.
It’s the responsibility of the plant operator to ensure they are not exceeding dust limitations at the plant in order to comply with the Federal New Source Performance Standards (NSPS). Therefore, installing a baghouse that not only works efficiently, but also operates properly at all times, is paramount to mix production success.
“The Federal New Source Performance Standards (NSPS) limits particulate concentrations from a
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PRODUCTION NOTES hot mix facility,” Catherine SuttonChoate, director of environmental compliance & product documentation at Astec, Inc. says. “That's the only emission regulation for our industry that is enacted on the Federal level and asphalt plants must hit that standard. Baghouses are the best available control technology to meet that standard.” For a baghouse to function properly, and keep your asphalt plant compliant, there are a few things asphalt producers need to keep in mind. BAGHOUSE MAINTENANCE MATTERS Like anything at your asphalt plant, the baghouse needs regular maintenance in order to ensure proper operation.
Most baghouses need the following items checked for routine maintenance: • Check that all solenoids are functioning properly and replace if necessary. • Check pulse duration, interval and pressure. Monitor pressure drop across the bags. • Monitor the pressure in the manifold to make sure the bags are pulsing at an appropriate pressure. • Visually examine the bags monthly. • Make sure blowpipes are properly aligned to ensure pulse air enters the bag. Never walk on blowpipes as this can warp them and cause misalignment. • Examine venturi’s and be sure they are in good working order as these
“The baghouse is the best available control technology to meet the Federal New Source Performance Standard.” Anything that prevents baghouse bags from cleaning is going to increase the differential pressure across the bags. That in turn increases the overall differential pressure throughout the entire production facility from the drum through the fan. This is why proper maintenance is important.
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PRODUCTION NOTES components are what induce the shockwave to go down through the bag. • Check for air leaks in the exhaust system, including aggregate and recycle inlets, connection bands on the ductwork, holes in equipment, access doors not tightened and missing/damaged seals. If these items are not attended to bag performance will decline over time and failure will occur as dust is pulled into the felt. As the resulting pressure drop increases, particulate penetration will escalate due to the need to maintain burner suction. “If plant owners are not performing at least some of the basic maintenance procedures on their baghouse then they can run into problems,” Sutton-Choate says. “Anything that prevents baghouse bags from cleaning is going to increase the differential pressure across the bags. That in turn increases the overall differential pressure throughout the entire production facility from the drum through the fan. “Exhaust fans are only designed to generate a certain amount of static pressure and so if the pressure drop through the equipment gets too high, then the fans simply cannot
“One of the main reasons baghouse bags fail is due to a condition called blinding which causes reduced permeability along the bags.”
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T
generate enough airflow to sustain the production process and production is going to start suffering.” Sutton-Choate says what causes an increase in pressure differentiation across the baghouse is what is known as blinding. Blinding is a condition of reduced bag permeability. It means that something is restricting the air from being able to pass through the felt of the bags. One common way to blind the bag is literally by pulling dust into the felt thereby embedding dust particles into bags. This happens when the differential pressure across the bags increases and the plant exhaust system works harder to pull air through the bags and maintain suction. Sutton-Choate says this is one of the main reasons bags in the industry fail and must be replaced. Blinding can also occur if the temperatures within the baghouse drop below the dew point. This causes moisture to start condensing out of the flue gases which creates mud on the bags, interior walls and everywhere else. "Leakage, which is the silent killer of production, uses up baghouse capacity. It can also lead to condensation inside the baghouse," Sutton-Choate says. "Mud cannot be removed by the cleaning system. It requires somebody
For a baghouse to function successfully today, it not only has to maintain a high level of airflow in order to support the production process, but it also has to do it while also maintaining an extremely high collection efficiency.
to physically get inside the baghouse and scrape the mud off the bags. Plant owners can also remove the bags and work on them externally, but it still requires a physical person to do the work and not the baghouse cleaning system doing it automatically.” UNDERSTANDING THE SIGNIFICANCE OF HYDROLYSIS Another factor that leads to premature bag failure is what is known as hydrolysis or the weakening of the bags due to chemical breakdown. Hydrolysis affects the ability of the bags to clean because it causes them to shrink significantly. This can lead to the blinding previously mentioned, even if the cleaning system is functioning properly. Hydrolysis also causes bags to have weakened fibers, which may result in holes developing since these weakened bags are more susceptible to abrasion by aggregate particles or
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PRODUCTION NOTES cleaning at excessive pulse pressures. “Blinding resulting from hydrolysis is the number one reason bags fail in our industry,” Sutton-Choate says. “Bags in an asphalt plant baghouse are prone to hydrolysis because the phenomenon is caused by exposure to moisture at elevated temperatures. This combination of moisture plus heat is exactly what is produced during the aggregate drying process at an asphalt mixing plant.” For the last several years, the industry has been working to educate customers on what hydrolysis is and how they can minimize the effects of it. “We minimize hydrolysis by offering solutions to control the maximum
temperature of the air going into the baghouse because hydrolysis is so dependent on temperature,” SuttonChoate says. Additionally, since moisture is one of the contributing factors to hydrolysis, anything that brings down the moisture content of the aggregate will also help to slow or minimize bag hydrolysis. Proper stockpile management is one the least expensive and most efficient ways to minimize moisture. “For a baghouse to function successfully today, it not only has to maintain a high level of airflow in order to support the production process, but it also has to do it while also maintaining an extremely high
collection efficiency,” Sutton-Choate concludes. “We're dealing with limits now that are one quarter of the Federal limit or less so every time a customer starts up their baghouse, there is zero room for error. We need to help customers get there.”
For more information on baghouse maintenance, visit ForConstructionPros.com/ 12152096
Proper stockpile management will reduce moisture in the mix which can help slow or minimize bag hydrolysis.
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PRODUCTION NOTES Maxam Accu-Flo Asphalt Additive System Maxam Accu-Flo Asphalt Additive System helps asphalt plants save on energy costs by removing the need to heat the additive tank. • Heats only the metered additive • Handles the most viscous additives • Integrates with existing plant controls ForConstructionPros. com/12321030
Meeker Liquid Vision
Meeker Equipment Co. Inc. Meeker Equipment offers its Liquid Vision digital tank monitoring and valve control system that is designed to ensure safety and reliability when filling your tanks. • Immediate tank level inventory at a glance • Does not expose workers to hot air temperatures on tank • Visual and audible signals for tank levels • Keeps workers aware of tank overfill conditions • Local or remote control ForConstructionPros. com/12316216
Systems Equipment ADP-100 Drum Mix Process System Designed to proportion aggregates and additives according to prescribed mix design formulas, and to measure and control the liquid asphalt mass flow rate, so the blends are accurately interlocked to the measured aggregate flow. • Available with text-based format OR with a Windows-Based Graphics enhanced User Interface ForConstructionPros. com/20864799
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ASPHALT CONTRACTOR OCTOBER 2020
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ADM EX 8844 Asphalt Plant The ADM EX Series Model EX 8844 asphalt plant allows contractors to increase capacity with up to 50% RAP in a compact package. • Counterflow technology allows for maximum heat transfer and fuel efficiency via separate drying and mixing zones • Efficient plant design provides single-operator capability, easy troubleshooting and simple on-site maintenance while virtually eliminating blue smoke and hydrocarbon emissions for clean operation • Plant control add-ons allow for greater customization, uptime and efficiency ForConstructionPros.com/21039896
Astec, Inc. PMII-A Continuous Mix Blending Controls
Ammann ACM 140 Prime Asphalt Plant
PMII controls and monitors proportional control of aggregate feeders and the blending of asphalt, recycle, shingles, and additives. PMII is ideal for retrofit applications. The PMII replaces existing PM96 control systems or can be installed new when manual controls are desired • Programmable Logic Controller (PLC) helps reduce control system downtime • PMII helps you meet or exceed state automation requirements while allowing flexibility for customization
The ACM Prime Asphalt-Mixing Plant is perfect for those who have a number of small jobs in varied locations and where frequent transport is required, and for paving contractors looking to introduce asphalt production. • The plant excels at specialty mixes, such as those used for paving tennis courts and running tracks • The ACM 140 Prime offers output of up to 154 tons per hour • Engineered for smaller volumes and therefore produces them efficiently, delivering cost savings in fuel and electrical energy consumption
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CMI Portable Roto-Aire Baghouse Portable, Roto-Aire baghouses feature Roto-Step differential pressure cleaning system significantly extending bag filter life. • Roto-Aire are available with two, three or four rotor configuration with performance ranging from 18,000 to 102,000 ft3 /min (30,582 to 173,298 m3 /hr) • Available in portable and stationary configurations and in a variety of sizes • Featuring a unique reverse flow cleaning system that reduces the maintenance inherent with pulse jet baghouses without the complex damper systems and blowers associated with other reverse air systems • Bag cleaning is achieved by channeling a surge of atmospheric air, in the reverse direction, through the bag, causing the bag to expand. This gives a much less aggressive cleaning of the bags, resulting in longer life and uses less moving parts • Roto-Step differential pressure cleaning system significantly extending bag filter life ForConstructionPros.com/12320511
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9/24/20 8:49 PM
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9/24/20 12:03 PM
JOBSITE INNOVATIONS |
BY JESSICA LOMBARDO, EDITOR
ASPHALT DENSITY Comes in
42
WAVES
ASPHALT CONTRACTOR OCTOBER 2020
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www.ForConstructionPros.com/Asphalt
9/24/20 12:19 PM
New screed plate system can achieve 89% density behind the paver
M
any paving companies know the importance of achieving density right behind the paver when the mix is still at its hottest temperatures. This is why articles on compaction and achieving optimal rolling patterns are consistently some of the top viewed content on our website. Obtaining compaction right behind the paver is also why manufacturers are working on developing higher density screeds that help achieve density levels before a roller even hits the mat. A new type of screed plate has recently been introduced to the market that also helps aid in compaction behind the asphalt paver, but it's not like anything we've seen in the industry before. SPEED MATTERS Stuart and Michael Frost spent hours building roads and acquiring their first equipment fleet of Tonka Toys as young boys. They joined the family construction business at an early age and in 1999
The texture of this screed plate adds a lateral component as well as a longitudinal and vertical component. As the mix enters the OXCLAW immediately multiple forces are applied to the aggregate. At multiple depths, along with the vertical and longitudinal forces, the mix is moved side to side laterally, kneading the aggregate in place until it finds its final resting place. This movement aids in remixing your asphalt, helping with any possible segregation you may have.
www.ForConstructionPros.com/Asphalt
ACON1020_42-45_JobsiteAxenox_J.indd 43
they created Mountain Construction Company where you will still see them working on the crew today. This has led to years of firsthand industry experience, knowledge and a yearning to make the job more efficient and cost effective. This has also made them efficient in knowledge of what works and doesn't work so well in our industry. Their idea for a new type of screed came after spending hours underneath a paver trying to change a worn out screed plate in the middle of the night.
does not need to be replaced for the life of the paver. DENSITY MATTERS MORE The brothers didn't stop there as they wanted to find a solution to get better density behind the screed as well. That thinking led to a patterned screed plate to aid in compaction and ride. The AXENOX patented screed plate systems provide a 3D progressive textured wave through the OXCLAW, eliminating the stereotype that all screed plates must OXCLAW is a patterned screed plate designed to aid in compaction and ride.
In between probably many frustrated moments, the thought came to them that there had to be a better way. That is when they decided to try and solve the challenge of quickly changing a screed plate and getting better densities behind the screed at the same time. This patented system allows the contractor to remove and replace a screed in about two hours rather than two days. With the new patented AXENOX Screed System, there is no more chiseling out hard bituminous material or screwing off the nuts and working around the electric heating elements to change the plate. Once the aluminum conductor plate is installed, it
be smooth. For the first time, there is a 3rd dimensional component applying multiple force vectors which allows the mix to roll and interlock more efficiently than the traditional flat screed plate. The result is higher densities on your uncompacted mat. Currently there are four OXCLAW equipped pavers laying asphalt across the US. Each are showing the same results, no matter the depth laid, mix type, aggregate makeup or A/C polymer used, the densities behind the screed are coming out anywhere from 85% to in some cases 89%. “You can walk across the uncompacted mat and you can feel how dense
OCTOBER 2020 ASPHALT CONTRACTOR
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JOBSITE INNOVATIONS
The screed plate has a 3rd dimensional component which allows the mix to roll and interlock more efficiently than flat screed plates.
it is," Brent Carron, owner of Valley Paving, Inc. says. "The roller operators immediately notice it as well, they are not getting the squish out or leaving the marks and bumps they are used to.” This is because the aggregate isn’t having to swim around to find its place in the more compacted mat. Thermal profiles and mix segregation, both in heat and gradation along with longitudinal joint density, have been a hot topic for the asphalt industry. The texture of this screed plate adds a lateral component as well as a longitudinal and vertical component. As the mix enters the OXCLAW, multiple forces are immediately applied to the aggregate. At multiple depths, along with the vertical and longitudinal forces, the mix is moved side to side laterally which kneads the aggregate in place until it finds its final resting spot. This movement aids in remixing your asphalt, helping with any possible segregation you may have. Owners have been pushing the industry to find ways to increase mat density, reduce aggregate segregation,
provide even consistent thermal temperatures and reduce longitudinal joint failures. Compacting an unconfined edge with the OXCLAW, you will see little to no “squish out” at the edges as they are more stable. This lends itself to better, and more consistent, density numbers on both sides of the longitudinal joint. "There is nothing else like this in the asphalt industry," Carron says. "The idea that a non-smooth screed can produce an even, flat surface is crazy enough, yet this screed does so much more. The compaction is amazing from what we have seen so far. Our crew is getting 87% to 89% density before the knock down roller even hits it. And once the knock down roller does hit the
mat, it barely compresses. No squish out on the edges, no cut marks from turning, it's like it's already stiff, yet still 280° F." With 3D angles of attack, the OXCLAW is able to produce a higher density as well as a more uniform and smooth surface. AXENOX has been putting this screed system to the test in Minnesota, Wyoming and Kansas with three different companies all experiencing the same results, higher compaction and smoothness. "We're still finding out new advantages of owning this screed and what it can do for this industry. To date, we don’t have any complaints and the owners of the roadways we are paving are in awe and baffled at the same time, and can't believe the results we're getting," Carron says. "We have a lot more tons of asphalt to lay with this screed, but so far, it's made a believer out of many. I’ve been in this industry since I was in diapers, and I don’t know of another advancement with the asphalt paver that compares to this."
For more information on managing asphalt density, visit ForConstructionPros. com/21037795
Even though the screed plate system features a wave, the result of the mat is smooth.
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www.ForConstructionPros.com/Asphalt
9/24/20 12:21 PM
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9/24/20 12:21 PM
JOBSITE INNOVATIONS |
BY ALLAN HEYDORN, CONTRIBUTING EDITOR
WMA, SMA Mix Design Produces
SMOOTH ROAD
Martin Marietta combines two technologies, two paving projects and receives NAPA award
M
artin Marietta, Lakewood, CO, had produced and worked with both warm mix asphalt and stone matrix asphalt before, but last year for the first time they combined the two on two road paving projects where half of the road was owned by Lakewood and half by Denver.
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Martin Marietta bid the job for each city separately, but when they were awarded both contracts they decided to combine the work and complete them as one job, according to Andrew Chaulk, project manager, Martin Marietta. The contractor milled 40,000 sq. yds 1 ½ in. thick of pavement and constructed a 2-in. overlay using 4400 tons of hot mix asphalt. “We looked at them as two separate projects and bid them accordingly,” Chaulk says. “Once we were awarded both contracts, we treated them as one job. It was a straightforward operation. A pretty standard job that went really well.”
The 2019 Larry H. Lemon Quality in Construction Award recognized Martin Marietta, Lakewood, CO, for its work involving more than 40,000 sq. yds. of milling and 4400 tons of paving on West Belleview Avenue, the dividing street between Colorado cities Lakewood and Denver.
The resulting work, which received a smoothness bonus, was named one of the 10 recipients of the National Asphalt Pavement Association’s (NAPA) 2019 Larry H. Lemon Quality in Construction Award for excellence in construction of an asphalt pavement utilizing less than 50,000 tons of asphalt.
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JOBSITE INNOVATIONS
West Belleview Avenue is a four-lane road that measures 68 ft. wide, which includes four 12-ft. lanes and two 20-ft. turn sections in the middle. Martin MariThe etta began work in May 12-person 2019 and completed the paving crew job in eight working used a 10-ft. days.
Cat paver and three steel drum rollers operating in vibratory mode.
USING A WIDER MILL Chaulk says milling was done first over four days. Crews lowered all manholes and water valves and a subcontractor set up traffic control. They worked on the outside lane first, diverting traffic into the middle, then reversed and milled the inside lane while traffic was diverted to the outside. Martin Marietta hired a subcontractor to handle traffic control for them and there as many as 10 people controlling traffic through the
work zone. “It got extremely busy out there with traffic running by the work zone,” he says. “There was quite a bit of activity all the time.” Chaulk says arrow boards were set on both ends of the work zone and the subcontractor coned off the work area running a cone line the full length of
the street to separate the traffic from the work zone. Flaggers were used behind and in front of the mill and were also positioned strategically throughout the job to help with cross streets and to keep drivers from getting too close behind the mill. Crews used a 12-ft. Wirtgen milling
Because the milled pavement had been open to traffic, it was swept again before tack drivers sprayed asphalt emulsion onto the area to be paved for the day.
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9/24/20 12:39 PM
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The road was milled in sections using a 12-ft. mill. The contractor started on the outside lane while the traffic was in the middle and once the outside lane was milled, crews moved to the center. The same process was followed with paving.
machine throughout the job because the Lakewood contract contained a smoothness specification. “We carried that same thought process through onto the Denver side even though Denver didn’t have that spec,” Chaulk says. “The 12-ft. mill is 5 ft. larger than a standard 7-ft. mill and that 7-ft. mill puts you right in the middle of the travel lane,” he says. “On the second pass with a 7-ft. mill you usually end up leaving a small ridge that you don’t notice when
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you’re driving but that does affect the smoothness. A 12-ft. mill typically pushes that ridge to within a few inches of where the striping will be, depending on the lane width, so it doesn’t impact the profilograph.” Martin Marietta used one mill supported by a seven-person crew and between eight and 12 trucks hauling the millings away. “One person operated the mill, one person on the ground was responsible for guiding the trucks, getting them in place and backing them to the mill,” Chaulk says. “We had one person in the rear keeping an eye on milling depth and alerting the operator to anything in the pavement he might need to be aware of, a skid steer operator picking up extra debris, a broom operator and one laborer.” When milling was complete, the milled section was swept, and the traffic
control subcontractor applied temporary markings replicating the original striping before the road was reopened to traffic. WMA, SMA COMBINATION YIELDS BENEFITS Chaulk says that standard stone matrix asphalt (SMA) was specified in both bids. Lakewood also wanted to be environmentally conscious and wanted to be able to market the paving job as a green product by lowering the energy consumption in production of the mix. “Lakewood was interested in trying it to see what the benefits of warm mix asphalt were and what the challenges were, so they spec’d it for their half of the road,” Chaulk says. So when producing the mix, Martin Marietta added ZycoTherm, which Chaulk says lowered the production temperature of the mix from the typical
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9/24/20 12:40 PM
350°F to 275°F when placed. That also appealed to Lakewood because WMA enables the road to be opened to traffic sooner. “You have to let the mix cool to 170°F before we can open it to traffic and when you’re using WMA it only has to cool from 275°F to 170°F, not from 350°F so can let traffic on it that much sooner,” he says. “ZycoTherm increases the workability life of the asphalt and basically enables you to pave in colder weather,” Chaulk says. “We’ve used it before, but this was the first time we used it with SMA. We’ve also never used it with that much tonnage.” Chaulk says the 12-person paving crew used a 10-ft. Cat paver and three steel drum rollers operating in vibratory mode. He says the work was straightforward, completed much like any paving job. Because the milled pavement had been open to traffic, it was swept again before tack drivers sprayed asphalt emulsion onto the area to be paved for the day. A first-time effort combining warm mix asphalt and stone matrix asphalt to pave a road where each half was owned by a different city resulted in a 2019 National Asphalt Pavement Association honor for Martin Marietta, Lakewood, CO.
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He says the WMA/SMA mix acted just like a normal mix, for the most part. “For the first couple of truckloads it was a little tough to get through the machine because it was real sticky product, but once we got it worked through the machine it was pretty similar to a standard SMA mix,” Chaulk says. Chaulk says the only change they made in the paving process was adding an extra roller. “We added an extra roller to work out the roller lines farther back behind the paver and we could do that because the mix was cooling slower because it was WMA,” he says.
For more information on SMA, visit ForConstructionPros. com/20979521
Crews lowered all manholes and water valves before the milling, then once milling was completed raised them back up for the overlay.
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9/24/20 12:44 PM
JOBSITE INNOVATIONS MultiFit LLC Mini Line Automatic Joint Matcher The Mini Line Joint Matcher can help contractors stop eyeballing and start controlling joints and material thickness. • Automatic Joint Matcher automatically maintains the desired asphalt depth with precision • For paving machines with hydraulic or electric tow points
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Carlson CP60 and CP65 Wheeled Asphalt Pavers The CP60 and CP65 wheeled asphalt pavers are suited for use on motorized and nonmotorized pathways, urban streets, country lanes and more. • Available DEUTZ high-torque, Tier 4 engine • Deliver laydown rates of up to 250 tph • Optimal maneuverability with transport speeds of up to 16 kph • EZC34 electrically heated screed offers a standard pave width of 1.8 to 3.4 m and provides optimal ride uniformity, mat quality and pre-compaction • Available in vibratory and tamper bar models ForConstructionPros. com/21047851
Weiler P385B Asphalt Paver The P385B paver features a 3,000-lb. screed with a paving range of 8 ft. to 15 ft. 8 in. and thermostatically controlled electric heat. • Three operating positions allow for greater visibility and control with the adjustable, magnetic-resistance steering system • Optional screed-mounted control panels give additional function control from screed level • Durable undercarriage with automatic track tensioning has a 90-in. track length, 68 in. of ground contact and 140-mm track chain pitch • Highway class chains, conveyor and auger bearings provide long-term reliability and extended wear life ForConstructionPros. com/21018783
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Trimble Roadworks 2D Paving Control Platform Trimble Roadworks 2D Paving Control Platform is an automatic screed control system featuring intuitive, easy-to-learn software built on the Android operating system. • Can use various 2D references to pave with a fixed thickness • Utilizes same interface as the Earthworks Grade Control Platform and many of the same sensors as the PCS400 2D Paving Control System while running on a 7-in. TD510 touchscreen display • Two external keypads allow sensor values and input data to be easily changed in the field ForConstructionPros.com/21132376
HAMM WITOS HCQ Software
Volvo DD128C Asphalt Compactor
HCQ Navigator from HAMM uses a panel PC in the roller cabin to provide a live indication to roller drivers of the points that were already sufficiently compacted or where further compaction is necessary. This prevents over- and under-compaction while helping to optimize the number of passes. • HAMM is allowing more sustainable compaction in asphalt construction and earth work since supervisors can stay informed about the detailed construction progress at all times
Powered by a 148-hp Volvo D4 Tier 4 Final engine, the DD128C delivers fast rolling speeds while maintaining proper compaction spacing with the Impact Spacing Meter. • Includes a 79-in.-wide front drum with chamfer and radii drum edges and a 55-in.-diameter rear drum and autoreversing eccentrics • Automatic drum wetting systems on both drums • Amplitude range of 0.003-0.03 in. • Standard Compact Assist Intelligent Compaction System ForConstructionPros. com/21118954
ForConstructionPros. com/21122245
Dynapac SD Asphalt Paver Range The SD2500CS can meet tough ride specifications including airport runways, racetracks and new highways, plus is suitable for RCC paving applications. • Includes operator-assist technology such as Truck Assist, Light Assist, Width Assist and Screed Assist systems • Dual speed screed control offers two speed levels for faster reaction around quick obstacles and slower control for fine adjustments • Can be aired with the V5100THE tamper, high-compaction electric screed and extensions to pave to 27 ft. • “THE” high compaction screed technology allows flexibility of adjusting pressure and vibration parameters for optimal results ForConstructionPros.com/21120779
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Register at asphaltpavement.org/programs/napa-webinars ACON1020_54-55_JobsiteProducts_J.indd 55
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PRESERVATION UPDATE
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101: www.ForConstructionPros.com/Asphalt
9/24/20 12:58 PM
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Asphalt’s ability to make meaningful economic and sustainable impacts makes the material ripe for opportunity
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f the 2.7 million miles of paved roads in the U.S., 94 percent are surfaced with asphalt1. There are a few likely reasons asphalt is used more often than other pavement alternatives – for one, studies have shown that asphalt pavement has a high return on investment thanks to the material’s durability and given it requires less energy to produce compared to concrete. Asphalt is also recognized as a great renewable resource. In fact, reclaimed asphalt pavement (RAP), also known as recycled asphalt, is an attractive solution given the reduction that using recycled asphalt can have on project costs while also helping to provide a more sustainable project. According to the National Asphalt Pavement Association, it is estimated that the recycling of asphalt pavement saves the American taxpayer more than $2.5 billion and saves more than 60 million cubic yards of landfill space each year. Asphalt’s ability to make meaningful economic and sustainable impacts makes the material ripe for opportunity – this is an important area for new research, innovation and education to ensure correct use and safe handling of the recycled product.
Scratching the Surface www.ForConstructionPros.com/Asphalt
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A LOOK BACK: THE ‘GOLDEN AGE’ OF RECYCLING AND THE 2000’S REVIVAL Over the years, use of RAP has varied in popularity based largely on what is happening in the world, including economic pressures and other outside variables. The 1970s was the first time RAP was commonly used. Traditionally, recycling asphalt involves removing old asphalt pavement and taking it through a series of processes to produce RAP. Then, RAP is blended with new aggregates and asphalt binder to create a new,
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PRESERVATION UPDATE
Markus Spiske/Pexels
partially recycled, asphalt mix used to repave roads. When the recycling of asphalt became popular in the 1970s, it emerged during the energy crisis as an economical option, and the quantity of RAP used in mixtures could range as high as 50 percent. Towards the end of the 1970s and into the 1980s, RAP use declined due to an increase in affordable asphalt binder supply, and performance issues like excessive cracking were observed in some recycled roads, as technology at the time was not mature enough. In the 1990s, Superpave, an innovative new specification at the time, was introduced to prevent pavement deformation in the form of rutting. It limited the content of RAP in the binder and was also focused on preventing fatigue and low temperature cracking. With little economic benefit, RAP use declined to about 5 percent. In the 2000s, the high cost of asphalt binders influenced those in the industry to revisit
recycled asphalt, which has the potential to help save time and money in addition to being a sustainable option. By 2017, approximately 20 percent of RAP was being used on average in asphalt mixtures in the U.S. Today, as government regulations and organizational commitments to sustainable practices continue to grow around the world, additional attention to sustainable options like recycled asphalt is critical. PROPERTIES OF RECYCLED ASPHALT For recycled asphalt, the quality and performance can be affected by the specific recycled materials used. Understanding the potential affects that different recycled materials can have will help ensure a quality finished product. In the end, recycled asphalt will need to withstand significant weight on roads as well as extreme weather conditions, both of which are major factors that cause stress on road material. When blended correctly, with the right technology and machinery, RAP containing pavement performs similarly to pavements built exclusively of virgin materials. Use of RAP helps minimize environmental impact by preserving natural resources, reducing landfill
waste, and minimizing energy spent by additional aggregate quarrying, asphalt production and transport. In addition to being a more sustainable option, the ease of use in construction is a key advantage for RAP over concrete pavement. Not only can RAP be easily added to new mix at the hot mix plant, only a single top layer requires being milled off and replaced. Moreover, there are technologies that allow for 100% in-situ recycling. Typically a road train of equipment mills and scrubs the asphalt pavement, mixes it with additives and new binders and places it back in its original place to create a fully recycled pavement. A new pavement can be produced without a single load of material being transported around. Usually this process is used to rehabilitate the structural pavement layers, and an overlay with hot mix is placed on top to preserve the in-situ recycled layers. A process like this is impossible with concrete pavement, where the whole pavement structure must be dug up and removed in order to replace with new layers. In addition, Understanding the affects different recycled materials can have will help ensure a quality finished product.
LE
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9/24/20 1:00 PM
LEADING ASPHALT TRADE SHOW AND CONFERENCE • See the latest equipment • Learn best practices and techniques • Improve your jobsite and business
March 9-11, 2021 | Atlanta, Georgia Learn more at worldofasphalt.com ACON1020_56-60_Pres_J.indd 59
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PRESERVATION UPDATE
Advanced solutions are being developed to enhance the performance of RAP.
recycled concrete cannot typically be used in the new concrete pavement, and can only be used in bottom construction layers, as a filler, or landfilled. So, why not turn to completely using recycled asphalt? It’s important to fully understand how the percentage of recycled asphalt used in the overall asphalt mix can affect the final product. Since the 1970s, the industry has debated this topic and the concern that the addition of high percentages of RAP could result in an undesirable chemical composition, prone to accelerate aging and eventually to significant stiffness of the asphalt mix leading to premature failure of the roadway. Increasing stiffness of an asphalt mix improves resistance to permanent deformation like rutting, but it can also cause increases in brittleness and be less resistant to fatigue and thermal cracking2. RECYCLING OF ADDITIONAL MATERIALS Besides RAP, common materials from outside industries that are recycled in asphalt pavements include rubber from used tires, asphalt roofing shingles, and steel and blast furnace slags. These materials have unique characteristics that ultimately impact the final recycled
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asphalt product. For example, used tire rubber can enhance overall pavement performance; meanwhile, steel slag can enhance aggregates strength, but both require the right technology in order to gain the associated positive effects. In addition to the specific materials, the actual recycling process can also affect performance. Significant advances in technology in the last decade have amplified the types of recycled materials that can be used in recycled asphalt. In addition, industry research continues around the changes in chemical composition based on the recycled material. This research is critical to determine which recycled materials could be chemically combative during the blending and diffusion process, and ultimately effect the end product. There is always a potential risk in recycling asphalt if companies can’t confirm the materials that were used to pave the road previously. This is important because when asphalt is recycled there are materials, like specific plastics, that are not compatible with the blending process. There are many different types of plastic, which is why research plays such an important role – recycling foreign materials like plastic requires knowing the specific way it should be prepared and the maximum amount of that material that can be used.
LONGEVITY OF RECYCLED ASPHALT Advanced solutions are developed to enhance the performance of RAP mixes. For example, storage silos for hot mix help fuse old and new binders together and produce a homogenous pattern in a mixture, making it more uniform and causing less cracking. The longevity and performance of a road ultimately depends on the type of road, stresses on the surface of the pavement (e.g. heavy trucks on highways vs. smaller cars driving around a parking lot) and weather conditions. The surface of the pavement is the most stressed layer, so using recycled asphalt below the top layer where it will not be exposed to salt, water and freezing weather can help extend the life of the road. The future of recycled asphalt, whether it includes improved longevity, innovation around new technology or the discovery of new materials that can be recycled during the blending process will all require continued industry research, communication among industry experts and funding to ensure the quality of the asphalt isn’t compromised along the way. Recycled asphalt has come a long way since its first big wave in the 1970s, and the industry is responsible for ensuring the final product is the highest quality and produces a safe experience and sustainable roads for years to come. About the Author: Pavel Kriz, PhD, PEng Americas Asphalt Technical Leader at ExxonMobil, has 20 years of asphalt technology experience, ranging from lab testing and research and development to refinery and customer technical support. He currently serves as an ExxonMobil asphalt technical team leader in the Americas.
1. Asphalt Pavement Alliance: https:// www.asphaltpavement.org/index. php?option=com_content&view=article&id= 14&Itemid=33 2.Road Materials and Pavement Design: https://www.tandfonline.com/doi/full/10.10 80/14680629.2019.1684346
For more information on RAP, visit ForConstructionPros. com/21089290
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9/24/20 1:00 PM
PRESERVATION PRODUCTS Diamond Road Smoother The Diamond Road Smoother combines a fast and accurate diamond tooth grinding system in a truck and trailer to smooth concrete or asphalt roads of bumps before preservation treatments such as chip seals, slurry seals and thin overlays. • Automated system is designed to increase the amount of roadway that can be smoothed each day • Multiple pivoting wheels on each arm smooth individual humps and dips, leveling a variety of surface defects • Grinder has been shown to cut a ¼ in. without pausing and could cut to ½ inch without slowing down ForConstructionPros.com/12231404
KM International T-2 Asphalt Recycler
Ergon eTac Bond Coat
KM T-2 Asphalt Recycler enables contractors to have access to hot mix asphalt all year. • Produces 4 tons of HMA an hour • Recycles millings, chunks and RAP into plant quality HMA
eTac Bond Coat of choice provides minimal tracking and maximum production opportunities. • Storage stable, user friendly and provides excellent compatibility between asphalt layers • eTac’s less tracking properties allow crews to spend time paving instead of cleaning the pavement
ForConstructionPros. com/20978624
ForConstructionPros. com/20866918
BOMAG 2200/60 Cold Planer The 600-hp-class 2200/60 cold planer features a Tier 4 Final engine and a reengineered milling chamber that improves the robustness and design of the front material depressor. • 11.8-in. track width and 67-in. track length provide optimal traction when milling at depths reaching 12.6 in. • Available in a 78.7- or 86.3-in. milling width, and features the BMS 15 milling tooth holder system • Quick-change cutting tool design reduces the time required to change a full set of teeth by up to 75% • Integrated dust extraction system improves working environment for operators ForConstructionPros.com/21094670
Wirtgen W 220 Fi and W 250 Fi Large Milling Machines The 801-hp W 220 Fi and 1,010-hp W 250 Fi serve a range of applications at a maximum milling depth of 14 in., making them suited for surface course rehabilitation and fine milling work to complete removal of the surface. • Various drive concepts are available to ensure maximum, optimal milling performance • In automatic mode, the Mill Assist standard assistance system automatically controls the two-speed Dual Shift powershift transmission • Wirtgen Performance Tracker (WPT) calculates the precise surface milling performance, milling volume and consumption values for the machine ForConstructionPros.com/21108870
www.ForConstructionPros.com/Asphalt
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Roadtec SX-8e/ ex Soil StabilizerReclaimer The 82,000-lb. SX-8e/ex is capable of cutting up to 20 in. deep and 100 in. wide and is designed for rehabilitation, cold recycling, or soil stabilization. • Rotor designed for milling and mixing the most resistant soils completely and homogeneously • Variable geometry cutter housing enables the unit to achieve material gradation with each pass • 755-hp Caterpillar C18 Tier 4 Interim (SX-8e) or 700-hp Caterpillar C18 Tier 3 (SX-8ex) engine ForConstructionPros. com/20973546
Caterpillar PM300 Series Cold Planers The PM300 Series features three drums sizes, wheel or track undercarriage and a swinging right leg to accommodate medium-sized milling projects and true flush cutting on the right side. • 325 hp C9 ACERT engine matched with an optimized cooling system to power the rotor drive ForConstructionPros. com/20986630
RoadHog Milling/Stabilizing Attachments This attachment is suited for milling asphalt prior to overlay, cutting utility trenches and performing in-place recycling of chip and seal as well as stabilization of road base and soil. • Includes its own hydraulic system and a Caterpillar turbocharged Tier 4 diesel engine in 142-, 225- and 275hp versions • Cutting widths range from 40 to 96 in. with a cutting depth to 12 in. using replaceable carbide cutting teeth ForConstructionPros. com/20985850
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CLASSIFIEDS
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CLASSIFIEDS
ASPHALT PLANTS · Gencor 300 TPH counterflow drum mix plant · Stationary 400 TPH counterflow drum mix plant · Astec 350 tph Relo Double Barrel plant w/4 silos · Barber Greene 350 tph portable drum mix plant · ADM 325 TPH Milemaker counterflow drum mix plant · Gencor 7’X40’ counterflow plant · Boeing 200 stat. drum mix plant · Adm 100 tph stationary plant with silo & RAP · ADM 110 tph portable drum plant · Cedarapids 350 tph counterflow drum and baghouse · 150 TPH Stationary drum mix plant · Astec 6000# tower and elevator · Astec 36” x 105’ slat conveyor
· Standard Havens 38,000 CFM baghouse · 80,000 CFM Stationary Baghouse · Astec 400 tph Double Barrel only · CMI 600 barrel portable selferecting dust silo & pugmill · Astec 75 ton self-erect silo · ADM 42,000 CFM portable baghouse · Bituma 100 ton silo & slat conveyor · ADM six bin cold feed system · Heatec hot oil heater · Coneco 10 yard portable concrete plant
Please Call For Complete Inventory
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9/24/20 1:27 PM
INDEX Advertiser Index
PAGE
ALMix
9
Ammann America
52
Asphalt Drum Mixers Inc. (ADM)
11
Astec Inc.
19, 23, 27, 31, 34-35
BITCO
7
Blue Roads Solutions
25
Carlson Paving Products Inc.
67
Clarence Richard Company
29
Eager Beaver General Engines
49
Gencor Industries Inc.
3, 45
LeeBoy, Inc.
13
Libra Systems Corp.
21
Meeker Equipment Co. Inc.
33
Minds, Inc.
39
NAPA
55
National Pavement Expo
53
Paratherm
20
Pegasus Vans & Trailers, Inc.
37
Roadtec
68
Sapphire Gas Solutions
25
SealMaster
2
Systems Equipment
17, 47
Tarmac International, Inc.
51
Weiler Products
5
Wirtgen America Inc.
14-15, 41
World of Asphalt
59
Get fast, relevant product information in the Buyers Guide at
ForConstructionPros.com www.ForConstructionPros.com/Asphalt
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THE LAST EXIT
6 Photo Credit: saravut
Ways to Keep Your Construction Crew Healthy
Healthy workers are productive workers — less likely to call in sick and more likely to be alert, efficient and safe all shift long. Here are some things you can do to help
E
mployee health on the job has been in the news a lot recently for obvious reasons, but shouldn’t it be something we focus on all the time? After all, healthy workers are productive workers — they’re less likely to call in sick and more likely to be alert, efficient and safe all shift long. Here are six healthy habits to encourage with your crew. • Hydration. Construction work is physically demanding. The days are long, and the work can be hot much of the year. Your employees need to stay hydrated to stay healthy — and productive. Some studies show a 3-4% drop in hydration can lead
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to a 25-50% drop in productivity. Encourage workers to keep a refillable water bottle nearby at all times and provide a water cooler where they can fill up during their shift. Try not to keep coffee brewing all day and don’t offer soda as an option because caffeine accelerates dehydration. • Healthy eating. Grabbing fast food or a gas station meal is convenient, but it’s not helping anyone’s productivity on the job — or their waistlines. Make “meal planning” a topic of one of your employee meetings or safety talks and offer tips on how to pack a healthy lunch that will keep workers full and give them energy to get through the shift. (You’ll find plenty of examples just for construction workers online.) If you keep snacks around the jobsite, ditch the candy bars and chips and replace them with nuts and easy-to-eat fruits and vegetables like apples, bananas and carrot sticks. • Exercise. Equipment operators in particular spend a lot of the day sitting and performing repetitive tasks. A regular exercise routine — whether that’s walking, running, swimming, biking, weight training or some combination of activities — helps keep the muscles in shape and prevent injuries. It’s a great stress reliever, too. Think about offering your employees a discounted gym membership or other incentives to keep moving. • Rest. Getting enough sleep is key to staying alert and productive on the job. You can’t control your workers’ sleep habits, but you can give them space — and encouragement — to re-energize during their shift. Construction is a demanding job,
and breaks do make a difference, especially when shifts are long and the days are hot. Set aside a cool, quiet place where employees can rest their eyes and their minds for a few minutes at a time. • Basic hygiene. Anyone who didn’t know the importance of handwashing before certainly does now, but it’s not always easy on a construction job. Consider investing in mobile hand-washing stations that you can place in key areas around the worksite. Always make hand sanitizer available. And of course, urge employees to stay home if they don’t feel well. It’s important to build a culture where workers don’t feel like they’ll be penalized for calling in sick. • Wearables. Information is power, so consider providing wearable devices that help employees monitor important health information. These devices can track activity levels, heart and respiratory rates, and even sleep quality. Implementing wearable technology benefits you as the employer, but also provides value to employees — both on and off the job. Ultimately, every person’s health is his or her own responsibility, but as an employer you can influence positive behavior and create an organization where healthy habits are recognized and rewarded. It’s a win-win, after all — healthy workers contribute to a healthy bottom line. Lonnie Fritz is senior market professional, construction industries at Caterpillar Inc.
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